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Intel Corporation Message Board

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  • theblueredmonk theblueredmonk Sep 5, 2011 7:01 AM Flag

    Apple’s $399 Plan to Win Consumer Market in Summer 2012

    A 64-bit ARM is not needed for a smartphone or a tablet that is running small code-footprint applications. A 64-bit ARM would probably run at the SAME performance or slower than the 32-bit version.

    A 64-bit ARM is needed when you start solving problems that need more than 32-bits. IMO, you need a 64-bit CPU when you get to the laptop level problems. When a 32-bit CPU starts calliing a 64-bit math library to solve problems, you have hit the wall. I had problems with a 32-bit TurboTax. TurboTax hit the wall with some intermediate computation results.

    When ARM hits 64-bit, they will need some much, much better CPU designs to handle the apps that will run on them. It will take some time (if at all) for them to be successful.

    ARM 64bit WILL run slower than ARM 32bit. However, I am expecting ARM to have a thumb ISA (instruction compression) for 64 bit that will reduce much of the performance/power problems of going to 64bit.

    The jump to 64 bit is actually very simple. The floating point unit is 64 bits and the SIMD unit is 128 bits, it's only the integer and addressing modes that need 'building'. Clearly bandwidth needs improving, but that's for the SoC designers to sort out.

    At this stage we really don't know what the target market for these new 64bit cores are. They could just be for deeply embedded applications (such as network equipment) or they could be for laptop/desktop/server usage. Even then, they could still be targeting sub 1watt power consumption so wouldn't come close to Intel's high end in terms of performance.

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